Let f(x) = root x. If the rate of change of f at x = c is twice its rate of change at x=1, then c=...?

i have no idea what to do.

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- January 7th 2007, 04:41 PMabcocoarate of change type
Let f(x) = root x. If the rate of change of f at x = c is twice its rate of change at x=1, then c=...?

i have no idea what to do. - January 8th 2007, 12:01 AMearboth